Chair-iron.



H. W. BOLENS. CHAIR IRON.

APPLICATION FILED DEC. 9, 1907.

940,232. V Patented N0v.1e,1909.

attouma HARRY W. BOLENS, OF PORT WASHINGTON, WISCONSIN.

CHAIR-IRON.

Specification of Letters Patent.

Patented Nov. 16, 1909.

Application filed December 9, 1907. Serial No. 405,816.

To all whom it may concern:

.Be it known that I, HARRY XV. BoLENs, a citizen of the United States, residing at Port Washington, in the county of Ozaukee and State of \Visconsin, have invented new and useful Improvements in Chair-Irons, of which the following is a specification.

This invention relates to that class of chair-irons embodying an inverted U-shaped sheet-metal spreader and upon the opposite angles of which are riveted sheet-metal spider-arms.

Heretofore, in chair-irons of this style, the bridge-piece employed to engage and retain one end of-the compression-spring, has usually been afliXed in some manner to the spreader or spreader-plate, as it is sometimes termed, such being accomplished in various ways, but always with the result that the stress of the spring finally and entirely came upon the bearing-eyes of the depending sides or flanges of the spreader, thus causing the bearing eyes mentioned to become worn in instances where the pintle was fixedly mounted in the head-casting or yoke, and, consequently, the bearing-eyes moved upon the pintle.

The prime object of my present invention is to divide the strain of this bridge-piece between the spreader or spreader-plate and the usual hinge-pintle, whereby the undue wear upon the bearing-eyes of the spreader is avoided to a large extent.

Other, though minor objects of the invention, will hereinafter appear, and the novel features thereof will be particularly pointed out in the claims. I

Referring to the drawing-Figure l is a side-elevation of a chair-iron embodying my improvements; Fig. 2 is a centralyertical longitudinal sectional-view; and, Fig. 3 is a rear-elevation of the same. 7

Corresponding numerals of reference indicate corresponding parts in all the figures of the drawing. p

I have illustratedmy invention in connection with a well-known form of chainiron, the details of which, except as hereinafter described, do not enter into my invention, and, hence may be altered at will. In this instance, 1, designates the usual swivel 0r supporting-post, at the upper end of which is located a casting or yoke, 2, from which rises an inclined standard, 3, having a transverse opening, 4:- This casting or yoke is transversely bored, as at 5, and through the bore is passed the usual hinge-pintle, 8.

The spreader or spreader-plate, is formed of sheet-metal, and consists of the upper horizontal portion, 6, and the opposite depending ears or flanges, 7 near the lower ends of which are formed the usual bearingeyes that receive the ends ofv the hinge-pintle 8, whereby, as will be obvious the spreader is capable of tilting or oscillating. Upon the opposite angles of the spreader are located the spider-arms, 9, also formed of sheet-metal, and which as will be seen, are angular incross-section. Through the depending sides or flanges of these arms and the depending sides of the spreader, are passed pins 10 and 11, the former being disposed in front and the latter in rear of the inclined standard 3, if desired, whereby said pins form stops for limiting the oscillating movements of the spreader.

The bridge comprises a transverse portion, 12, having a transverse opening, 14, alining with the opening 4 in the inclined standard, and at each end, depending inwardly disposed legs or branches, 15. These branches or legs are provided at their lower extremities with half-round notches, 16, that bear on the hinge-pintle 8, to permit. which the casting 2 is recessed at opposite sides of the inclined standard 3, as at 2. (See Figs. 2 and;3). This forms the lower supportfor the bridge, and its upper support may be produced in various ways, but preferably by so forming the bridge as will adapt it to engage with the rear cross-pin 11. This 1 accomplish by providing the inner or front face of the bridge at its upper edge with either a single transverse rib extending from one vertical side to the other of the bridge and providing it with a half-round notch to engage the rear pin 11, or, as shown, with two of such ribs, 13, so notched,.and located at the two upper corners of thebridge, the result in both arrangements being the same. Of course, as will be readily apparent, it is not essential to the operation of the invention that the upper end of the bridge be supported by the pin 11, and that, if desired or preferred, the upper end of the bridge may be supported by and connected to any other part of the spreader, although, as a matter of fact the pin 11 is a part of the spreader,

through the bridge, transmitted to the hinge-pintle and removed from the spreader.

The spring-adjustment is of the ordinary,

type, and in this instance, comprises the rod, 17, which is passed through the openings 4 and 1 1 respectively formed in the inclined standard 3 and bridge 12, and which at its outer end is provided with the usual head 18, between which and the bridge, is located the tension-spring 22. The front end of the rod is threaded and carries the usual hand-nut or wheel, 19, and loose bearingsleeve 20, the'latter having bearing-lugs, 21, that engage with suitable notches formed in the side-flanges of the inclined standard 3.

Having described my invention, what I claim, is

1. A chair-iron, comprising a post, ahead having a transverse portion bored and provided with recesses near its ends communicating withsaid bore, a'hinge-pintle extending through the bore beyond the ends of the transverse portion of the head, a spreader mounted to oscillate on the ends of the hinge-pintle, a separate bridge piece supported at its upper end by the spreader and having depending members bearing on the hinge-pintle in the aforesaid recesses of the head, and a spring adjustment the spring of which bears against the bridge.

2. A chair-iron, comprising a post, a head, a transverse hinge-pintle extending through the head, a spreader mounted to oscillate upon the hinge-pintle, a pin extending transversely through the spreader near the I rear end thereof, a separate bridge piece the upper end of which fits between the sides of the spreader and is provided with notched lugs bearing against the pin, and depending members on sald bridge piece notched at their lower ends to bear upon the hinge-pintle, and a spring adjustment the spring of which bears against the bridge.

3. A chair-iron, comprising a head, a supporting-post, a hinge-pintle mounted in the head, a spreader mounted to oscillate on the pintle, a pin passing through the spreader, a bridge, the lower end of which removably engages the hinge-pintle and the upper end of which similarly engages the pin, and a an upper notched end engaging the rear pins and a lower notched end engaging and bearing upon the hinge-pintle, and a springadjustment, the sp ing of which bears against the bridge.

5. A chair-iron, comprising a post, a head at the upper end thereof, a hinge-pintle passing through the head, an inverted U-shape spreader mounted on'the hingepintle, a transverse pin extending across and connecting the terminals of the spreader, the bridge 12, having the notched ribs 13 engaging the pin and the lower depending arms 15, notched and engaging the hingepintle, a spring-adjustment, and a spring for the same bearing on the bridge.

6. A chair-iron, comprising, a supporting-post terminating in a casting or head transversely bored and cut-away, as at 2", the hinge-pintle located in the bore, the inclined standard. rising from the casting and having an opening, the inverted U-shaped sheet-metal spreader having its ears or sides mounted for movement on the hinge-pintle, the sheet-metal spider-arms, angular in cross-section and mounted on the opposite angles of the spreader, the pins passing through the sides of the spider-arms and the sides of the spreader in front and in rear of the standard and forming front and rear stops for the spreader, the bridge 12 having the opening 1 1, the notched ribs 13, and the depending inclined arms 15, notched at their lower ends, the notches of the ribs and arms respectively engaging the rear pin and hinge-pintle, and the spring-adjust- 

